Driving mechanism for tractors.



I.. IVI. YAGGY.

DRIVING MECHANISIVI FOR TRIACTORS.

WIT/VESSES IIIIIIIIIII m: nemers Frwsns cu., Puumvumo.. wnsnmqrurv. n. c,

Patented July 23, 1918,

"2 SHEETS-SHEET I.

ATTORNEYS UNITED sTATEs PATENT oEEicE.

LUTHER MARTIN YAQGY, or BoWiviAN, NORTH DAKOTA.

DniviNeMEcnANisivi EOE TRAcToRs.

To alliwhom t may concern.' l

Be it known that I, LUTHER M. YAGGY, a citizen ofthe United lStates, and a resident of Bowman, ink thev county of Bowman and tate of North Dakota, vhave invented a new and Improved Driving Mechanism for'Trac# tors,of which the following is a full, clear,

and exactl description.

My invention is applicable to tractorslgenc erally and more particularly relates to a tractorl in which therear axle ils driven from a motor inoun-tedon the tractor at the fronts clearly" appear from the specific description.'

following.

Reference is to be hadv to the accompanyi ingY drawings forming a part of this specifi'ca'tron in whichV similar reference chai"- acters indicate corresponding parts in all the views, it being understood that the drawings are merely illustra-tive of oneexainpl'er of the invention. Figure 1 is aside elevation efY aj tractor embodying'my invention, partsbeiirgbroken away and others being shown in section g.

Fig; 2 is ak plan view, parts being broken awayandothers in section; y

Fig. 3 is a fragmentary plan view of the` parts omitted from Fig. 2;

Fi 4 is a rear elevation of the beltshifting evice, the rigid levers being shown in section and their throw or vertical paths of movement being indicated by dotted lines.

The numeral 10 indicates a tractor frame which may be of any approved design; 11, the front axle having wheels 12; and 13, the rear driven axle having wheels 14. A suitable motor (not shown) is mounted on the frame 10 and in practice this preferably will be an internal combustion engine supported on the front platform 15, the character 15a indicating the motor hood.

The rear wheels 14 have rigid gear wheels 16 thereon meshing with which are gear pinions 17 on a transverse shaft 18. On the shaft 18 are fixed sprocket wheels 19 over which chain belts 20 run, said belts running Specification of Letters Patent. p

alsoabout chain wheels 21 fixed on a tran-sy verse shaft 22. Fixed on` the shaft` 22 also?,`

are ratchet wheels 23. YLooseon the shaft 22. between the ratchet wheels 23 are the weights 27, and said levers are actuated means next described. Y Y. Y

Adgacent to=1the= motor platform 15 is a transverse shaft 2S loose on which. arev breadv pulleys 29, 30:. Collars or equivalent means areV provided! to position the pulleys andthel shaft 28 turns in suitable bearings 32 on the tPatenten .I u'iyzs, 191e'.l Application filled Augustll, 1917. ScralNo. 18155751. 1 Y

Y Yso hubs 24 of ratchet levers 25 carrying pawlfs 26. The outer ends-of the levers 25 carryV frame 101. Either 'of the pulleys 291, 3()` is Y adapted to be ydriven fromthe motor shaft' (notv shown), through the medium of a belt f Over one pulley 29a straight belt 34 runs to a pulley 36 fast on a transverse shaft 38 andover the pulley 30 a cross belt B5 Y pulley 37 on the shaftrS-Q- Thus, through" may be turned inA reverse'directions,` shifting.

means being provided; for the drive belt 33" as hereinafter explained. The numeral 41'Y indicates bracket bearings for the shaft l38,-- it being understood that any'suitable are rangement of bearings is provided in prac-` tice.

On the shaft 38 are fixed sprocket wheels; 39,4() over which. chain belts 42,432 run,.and.

' runs, said belt running also. over a fixed 'l said belts extend upwardly and run also-1- i l about sprocket wheels 44 on an elevated shaftv 45 which is` mounted in bearings 46011 inclined pillars or frame members 47 suitabb7 secured1 on the frame 1f0fa`1s ttt-48:. `'Ehe shaft 45 is adapted to be turned back and forth, and it has fixed thereon ratchet wheels 51, 52, the teeth of which are oppo.

over and under the said drum and are conactuating the belt shifter 56 alternately inV raising the levers 25.

opposite directionsin unison with the movements of the ratchet levers 25 so that as one ratchet lever completes its working stroke to give a turning movement to the ratchet Wheel 23, the belt 33 Will be shifted from pulley 29 to pulley 30, or Vvice versa, to thereby, through the straight and cross belts 34 and 35, turn the shaft 38 alternately in opposite directions to turn the shaft back and forth and thereby alternately reverse the movement of the drum 53 for alternately I illustrate one means for vibrating the belt shifter. In the illustrated example there is formed on that arm of the lever opposite the fork 59 a contact block 60, V-shaped, to present sloping sides that flare upwardly. The block 60 is disposed vertically and is positioned to cause the sides of the saine to be alternately engaged by the weights 27 of the levers 25. In operation, therefore, with the belt 33 on the pulley 29, for example, the belt 34 Will be driven and will turn the shaft 38 in one direction and through the chain belts 42,

- 43, the shaft 45 and drum 53 Will be turned in one direction, whereby to Wind in the end of the chain or cable 54 engaged with one lever 25 at the same time paying out that end of the chain or cable engaging the other lever 25. As the raised lever reaches the block 60 it will shift said block laterally, thereby throwing the shifting lever 56 to a position to shift the belt 33 to the pulley 39, andthereby, through the cross 1belt 35, turn the shaft 38 in the reverse direction and give a corresponding reverse movement to the shaft 45 and drum 54 so that the lever 25 which was previously raised will be permitted to descend and the opposite lever 25 will be raised. The operation of the levers 25 in an obvious manner actuates with the paivls 26, the ratchet Wheels 23 thereby turning the shaft 22 and through the de- Uopiel oi this patent may be obtained for vided, there being indicated a steering rod Y 61, the steering Wheel 62 of which is adjacent to the seat 63. rllhe steering rod is shown as having a Worm 64 engaging a Worm Wheel 65 and ashaft 66 on which are drums 67 from which chains 68 run to 'the front axle 11 as at 69.

l Wish to state in conclusion that although the illustrated example constitutes a practical embodiment of my invention, l do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claim.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent:

A drive means including a shaft, a pair of pulleys thereon, a driven belt shiftable to either of said pulleys, a belt shifter to shift said belt, a second shaft having separate fixed pulleys, a straight belt running over one of the pulleys on the first shaft and over one of the pulleys on the second shaft, a cross belt running over the other pulleys on the shafts, a drum shaft, driving connections betWeen the drum shaft and the second shaft to turn the drum shaft alternately in opposite directions with the turning of the second shaft, a liexible element on said drum shaft, a fourth shaft, ratchet Wheels on said fourth shaft, levers loose on the fourth shaft and connected respectively with the opposite end of the flexible element on the drum shaft, pawls on the said levers adapted to engage said ratchet Wheels, and means to actuate the belt shifter by the movements of said levers.

LUTHER MARTIN YAGGY.

ve cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

